Answer:
624510100
Explanation:
Doing a conversion factor:
How does calcium obey the octet rule when reacting to form compounds?
2 answers:
Answer: Option (C) is the correct answer.
Explanation:
Atomic number of calcium is 20 and its electronic distribution is 2, 8, 8, 2.
Therefore, a calcium atom contains two valence electrons and in order to attain stability it needs to lose two electrons.
Hence, it acquires a charge of +2 as by loss of two electrons.
As, according to the octet rule there must be eight electrons in the valence shell.
Thus, we can conclude that calcium obey the octet rule when reacting to form compounds as gives up electrons.
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Answer:
Explanation:
Hess's Law of Constant Heat Summation states that if a chemical equation can be written as the sum of several other chemical equations, the enthalpy change of the first chemical equation is equal to the sum of the enthalpy changes of the other chemical equations. Thus, the reaction that involves the conversion of reactant A to B, for example, has the same enthalpy change even if you convert A to C, before converting it to B. Regardless of how many steps it takes for the reactant to be converted to the product, the enthalpy change of the overall reaction is constant.
With Hess's Law in mind, let's see how A can be converted to 2C +E.
(Δ
) -----(1)
Since we have 2B, multiply the whole of II. by 2:
(2Δ
) -----(2)
This step converts all the B intermediates to 2C +2D. This means that the overall reaction at this stage is .
Reversing III. gives us a negative enthalpy change as such:
(-Δ
) -----(3)
This step converts all the D intermediates formed from step (2) to E. This results in the overall equation of , which is also the equation of interest.
Adding all three together:
(
)
Thus, the first option is the correct answer.
Supplementary:
To learn more about Hess's Law, do check out: brainly.com/question/26491956